膠片等級(jí)問題

請(qǐng)問，接觸過(guò)歐標(biāo)的朋友G2類膠片是個(gè)什么等級(jí)？相當(dāng)于國(guó)標(biāo)的C？急！
原文是這樣描述的（僅此）：
Practical experience showed that the best possible test result will be achieved by angular radiation (exposure arrangement see figure 1). Testing shall be in accordance with DIN EN 1435, testing category B, i.e. as a rule by X-rays. The use of gamma rays (lr 192) shall be allowed in special cases only.

Vacuum-packed radiographic films of category G2 shall be used with screen combinations adjusted to the respective maximum energy. (A standard concerning the classification of X-ray films is in the course of preparation. Pending its publication, an assignment of film types to film categories authorized by the working group NMP 822 of the Normenausschuss Materialprüfung NMP (Standardization committee material testing) is applicable, published in the DIN-Mitteilungen. Reprints can be obtained from the NMP office).


The radiographic films (length 48 cm) shall be positioned so as to include the butt welds (transverse welds).

歐標(biāo)的膠片分類也是C幾，是打錯(cuò)了吧

yanghaiquan 發(fā)表于 2017-8-14 15:17
歐標(biāo)的膠片分類也是C幾，是打錯(cuò)了吧

甲方給的文件，估計(jì)是錯(cuò)了吧，，，我也找不到這個(gè)類別

我是新人，在這里向大家請(qǐng)教個(gè)問題，如圖的小徑管底片，中心一圈白色，可能產(chǎn)生的原因是什么

很規(guī)則的一根絲，是不是像質(zhì)計(jì)

大師兄?jǐn)嗨?發(fā)表于 2017-8-18 22:41
我是新人，在這里向大家請(qǐng)教個(gè)問題，如圖的小徑管底片，中心一圈白色，可能產(chǎn)生的原因是什么 ...

焊工水平不錯(cuò)哦，單面焊雙面成型，內(nèi)部余高均勻